/*
 *  ircd-ratbox: A slightly useful ircd.
 *  m_version.c: Shows ircd version information.
 *
 *  Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
 *  Copyright (C) 1996-2002 Hybrid Development Team
 *  Copyright (C) 2002-2005 ircd-ratbox development team
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
 *  USA
 *
 *  $Id: m_version.c 26094 2008-09-19 15:33:46Z androsyn $
 */

#include "stdinc.h"
#include "struct.h"
#include "client.h"
#include "ircd.h"
#include "numeric.h"
#include "s_conf.h"
#include "s_serv.h"
#include "supported.h"
#include "send.h"
#include "parse.h"
#include "modules.h"

static char *confopts(void);

static int m_version(struct Client *, struct Client *, int, const char **);
static int mo_version(struct Client *, struct Client *, int, const char **);

struct Message version_msgtab = {
	"VERSION", 0, 0, 0, MFLG_SLOW,
	{mg_unreg, {m_version, 0}, {mo_version, 0}, {mo_version, 0}, mg_ignore, {mo_version, 0}}
};

mapi_clist_av1 version_clist[] = { &version_msgtab, NULL };

DECLARE_MODULE_AV1(version, NULL, NULL, version_clist, NULL, NULL, "$Revision: 26094 $");

/*
 * m_version - VERSION command handler
 *      parv[0] = sender prefix
 *      parv[1] = remote server
 */
static int
m_version(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
	static time_t last_used = 0L;
	char version[64];
	if(parc > 1)
	{
		if((last_used + ConfigFileEntry.pace_wait) > rb_current_time())
		{
			/* safe enough to give this on a local connect only */
			sendto_one(source_p, form_str(RPL_LOAD2HI),
				   me.name, source_p->name, "VERSION");
			return 0;
		}
		else
			last_used = rb_current_time();

		if(hunt_server(client_p, source_p, ":%s VERSION :%s", 1, parc, parv) != HUNTED_ISME)
			return 0;
	}
	rb_snprintf(version, sizeof(version), "%s+%s", ircd_version, rb_lib_version());
	sendto_one_numeric(source_p, RPL_VERSION, form_str(RPL_VERSION),
			   ircd_version, serno, me.name, confopts(), TS_CURRENT, ServerInfo.sid);

	show_isupport(source_p);

	return 0;
}

/*
 * mo_version - VERSION command handler
 *      parv[0] = sender prefix
 *      parv[1] = remote server
 */
static int
mo_version(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
	if(hunt_server(client_p, source_p, ":%s VERSION :%s", 1, parc, parv) == HUNTED_ISME)
	{
		sendto_one_numeric(source_p, RPL_VERSION, form_str(RPL_VERSION),
				   ircd_version, serno,
				   me.name, confopts(), TS_CURRENT, ServerInfo.sid);
		show_isupport(source_p);
	}

	return 0;
}

/* confopts()
 * input  - 
 * output - ircd.conf option string
 * side effects - none
 */
static char *
confopts(void)
{
	static char result[15];
	char *p;

	result[0] = '\0';
	p = result;

	if(ConfigChannel.use_except)
		*p++ = 'e';

	if(ConfigFileEntry.glines)
		*p++ = 'g';
	*p++ = 'G';

	/* might wanna hide this :P */
	if(ServerInfo.hub)
		*p++ = 'H';

	if(ConfigChannel.use_invex)
		*p++ = 'I';

	if(ConfigChannel.use_knock)
		*p++ = 'K';

	*p++ = 'M';
	*p++ = 'p';

#ifdef HAVE_ZLIB
	*p++ = 'Z';
#endif

#ifdef RB_IPV6
	*p++ = '6';
#endif

	*p = '\0';

	return result;
}
